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Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the traction control switch.
  2. Test for less than 5 ohms between the ground circuit terminal 13 and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify the scan tool BCM TCS Switch State parameter is Released.
    • If not the specified value, test the signal circuit terminal 14 for a short to ground. If the circuit tests normal, replace the BCM.
  4. Install a 3A fused jumper wire between the signal circuit terminal 14 and the ground circuit terminal 13. Verify the scan tool BCM TCS Switch State parameter is Pressed.
    • If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM.
  5. If all circuits test normal, replace the traction control switch. If the DTC resets, replace the BCM.
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